Steam-superheater



F. ST. 6. KIRKE.

STEAM SUPERHEATER. APPLICATION FILED AUG.:?,19I7.

' Patented M126, 1920.

2 SHEETS-SHEET 1.

Will/17706 jjwyv P. ST. 6. KIRKE.

STEAM SUPERHE ATER. APPLICAIIdN FILED AUG.7,1917.

1,335,974. Patented Apr-6,1920.

. SHEET 2.

ZSHEETSQ 6 W2 0 2 0 i @Q p I ""8 I eren'ce particular,

PERCY s'r. GE'OBZGE'I'KIRKE, -orwnsrvr-itrs rnrd,- Lennon,- ENGLAND.

sTEAM-sUrER-HEArER.

retested Apr. 6 1920.]

Application filed nugus t 7, 191*); Serial no. 1224,9441

' To all whom it may concern:

Be a; known that I, PER-CY sir; Ganges KIRKE, a subject ofthe Kingof Great Britain andIrelan'd, and" residentin'fthe city of Westminster, IJondon,' ,England, have in- .ventediiew' and useful Improvements in or in Connection with St'am-Siiperheaters, of

which the following isa specification. I

This invention] hasfrel ation' to the P P? duction' of superheated steam, and has refl heat produced by burning" a mixture" of Y gaseous fuel and-air on' thesurface of, or

in the neighborhood of, an incandescent body placed within a boiler fire tube.

The invention is applicable to steam generators of the type in which hot products of combustion pass through tubes or flues, such tubes or fiues, herein called tubes, being in contact on their outer surfaces with the water, and being packed or charged with packing material, which accelerates the.

transmission of the sensible heat in the gases and combustion products in passing through the spaces between the packing material and the tubes to the water in the steam generator.

Steam superheating arrangements in accordance with this invention, comprise boiler tubes, each in part packed or charged for a portion of their length with packing material in contact with, or in the neighborhood of which combustion of the gaseous fuel may take place, superheating coils arranged within another portion of each of said tubes, and further partly filling packing material in the remainder of said tubes so as to re; duce the temperature of the gases and combustion products to a few degrees above that of the saturated steam.

The accompanying drawings illustrate a gaseous fuel fired steam generator of the kind referred to provided with superheating arrangements in accordance with this invention.

Figure 1 is a longitudinal sectional view; and

Fig. 2 is an end elevation. Fig. 3 is a detail view of the refractory material.

Fig. i is a sectional view of the packing material.

1 is the shell of the steam generator in the end plates of which are secured the ends of a plurality of tubes 2 through which the but" not exclusively," a j the superheating of-steam generated' by" the hot'products oficon ibustionpass, The'tubes 2' are packedorcharged from one end for a' portion of, theirl-ength with refractory material-3 so as to only partially obstruct the passage of the line gases, preferably'as. described and claimed in the specification forming part of an application foriLetters Patent Serial No. 132,448,; dated20th November, 1 916, and filed by the applicant herein. The refractory material 3 is shown in Fig. l to consist of rectangular'blocks twisted with respect to each otherin step form in order toform a sinuous path for tl e gases-totheboiler tubes '2. The

lengtlroftheblocks is shown to be substan-" tially that of the diameter of the tubes and the end on width about one-third of the length of the blocks. 4 are gaseous fuel supply nozzles, there being a nozzle for each tube 2. Gaseous fuel is supplied to the nozzles 4 through a main 5 and is regulated by a valve 6. The gaseous fuel from the nozzles f and air are induced intomixing chambers 7, with which the one end of each tube 2 is provided, and to form therein a combustible mixture, combustion of which is completed in K301113301, with, or in the neighborhood of, the refractory material 8,

all in manner well understood.

.8 are the superheated coils. These coils 8 are inserted within, and from the opposite end of, the tubes2 so as to occupy positions therein adjacent the refractory material 3. The remainder of the length of each tube 2 is filled with further packing material 9 so as to only partially obstruct the passage of i the flue gases. The superheated coils 8 extend backward and forward of the tubes 2, and each coil is connected at one end to a header 10 in connection with the source of saturated steam and at the other end to a header 11 in connection with the steam engine or other means in which the superheated steam is utilized.

The packing material 9 is shown pointed against the direction of the flow of the gases, so that any dust contained in the gases may pass out of the end of the boiler tubes 2. The refractory material 9 may be of varying shape, but a conical or cylindrical shape having wings 9 to enable it to be inserted approximately concentric with the tube axis is preferred, slots being also formed in it to receive the superheated inlet and outlet tubes. Or the packing material 9 may be cut away on its lower portion and the superheater inlet and outlet tubes led through the space formed by and be tween the wall of the tube 2 and the packing material 9. The packing material 9 contained in each tube 2' may be in one length if desired, and as the temperature at this point is comparatively low, it may be made of metal, if preferred. The distance between the headers 10, 11 and thesends of the tubes 2 is preferably made longer than each piece of packing material 9, so that the latter can be inserted and extracted without removing the headers. Or, as shown, the headers 10, 11 may be so disposed and arranged as not to interfere with the insertion and extraction of the packing material,

' The object of the packing material 9 is to enable the gases to have their heat efficiently abstracted by the superheater present.

What I claim is 1. A boiler heating and superheating system comprising a boiler, a passage for hot gases within said boiler, said passage having sage for hot gases comprisinga refractory chamber for higher temperatures having means therein to give a helical path tothe hot gases, a steam superheating chamber in communication with said refractory chamber, a steam superheating means within said superheating chamber, and a second refractory chamber for lower temperatures in communication with the said superheating chamber and having means therein to give to the gases a substantially "straight line path. Dated this 6th day of July, 1917.

PERCY ST. GEORGE KIRKE. V 

